National Instruments FP-PWM-520 - Manual (Page 8)

FP-PWM-520 and cFP-PWM-520 8 ni.com
To configure the duty cycle, write to the channel for which you
want to set the duty cycle. The duty cycle is the proportion of time
that the PWM signal is ON over the period.
Enter a value from 0 to 100 to set the duty cycle. The duty cycle has
12-bit resolution (4,096 discrete duty-cycle settings).
Figure 4. Period and Duty Cycle of a PWM Output
Status Indicators
The [c]FP-PWM-520 has two green status LEDs, POWER and
READY. After you insert the FP-PWM-520 onto a terminal base
or the cFP-PWM-520 onto a backplane and apply power to the
connected network module, the green POWER indicator lights
and the [c]FP-PWM-520 informs the network module of its
presence. When the network module recognizes the
[c]FP-PWM-520, it sends initial configuration information to the
[c]FP-PWM-520. After the [c]FP-PWM-520 receives this initial
information, the green READY indicator lights and the module is
in normal operating mode.
In addition to the green POWER and READY indicators, each
channel has a numbered, green status LED that lights when the
channel is in the ON state.
1 PWM Output 2 On Time 3 Period
Duty Cycle
OnTime
Period
--------------------- 100
×
=
0
V
SUP
1
3
2 2
3